Woman flashes during news report

A mundane news report on the highly stage-managed US election campaign received an injection of spontaneity when a woman used a live cross to show off her ample assets.

Yesterday, NBC reporter Pete Suratos was speaking about an upcoming Hillary Clinton fundraiser when the woman described as a "Reese Witherspoon lookalike" seized her opportunity, The Huffington Post reports.

Grinning from ear to ear, the blonde snuck into the shot and lifted up her top to reveal her breasts.

She held the pose for a second and made a swift getaway as Suratos continued his report oblivious to the eye-catching moment of exhibitionism behind him.

The reporter's colleague back in the studio apologised for the nudity.

"I don't get it. Was there something behind me?" Suratos later wrote on Twitter.